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AIIMS 201827 May

Exam: AIIMS
Year: 2018
Date: 27 May
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

AIIMS 2018 · 27 May · Chemistry · General Principles and Processes of Isolation of Metals

Which process is used in smelting during metallurgy of copper?

Which process is used in smelting during metallurgy of copper?

Options

ASelf reduction of copper
B $\mathrm{Cu}_2 \mathrm{~S}$ is converted into $\mathrm{Cu}_2 \mathrm{O}$
C $\mathrm{FeS}$ is converted into $\mathrm{FeO}$
DReduction of $\mathrm{Fe}$

Correct answer

C. $\mathrm{FeS}$ is converted into $\mathrm{FeO}$

Step-by-step solution

Smelting of

\mathrm{Cu}

results in slag formation and matte formation.

\begin{aligned} \mathrm{FeS}+\mathrm{Cu}_2 \mathrm{O} \rightarrow & \mathrm{FeO}+\mathrm{Cu}_2 \mathrm{ S} \\ \mathrm{FeO}+\mathrm{SiO}_2 \rightarrow & \mathrm{FeSiO}_3 \\ & \text{ (slag) }\end{aligned}

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